Ore-concentrator.



G. W. BURNHART.

ORE CONCENTRATOR.

APPLICATION FILED JULY 13. 1917.

1,295,261 Patented Feb. 25, 1919.

INVENTOR C ZZ 54mm TTORNEY (5. w. BURNHART. one cowcememez.

APPLICATION FILED JULY I3. 1917. I 1,295,267, Patented Feb. 25, 1919.

2 SHEETS-SHEET 2.

I N V F; N TO R Q. mwizizarf ATTORNEX GEORGE w. BURNHAIRT, E DENVER, conoithno.

onE-coivcnnmerok.

Speeification of hetters reterit. t t 25, 1919 Appli catioirfiled' aiily 1's,- iei'z. Serial No. 180,445.

To all whom it may concern;

Be it known that I, Giotto -W. BURN- HART, a citizen of the United States, residing at Denver, in the city and county-of Denver and State of Colorado, have vinvented cert'a'in new and useful Improvements'i'n Ore-Concentrators, of which the following is a specification.

This invention relates to ore concentra- 'upon which crushed ore and water is dis- .-charged, and which under forceful recip- "rocation, and the flushing action of the water, effects the separation of the ore from the tailings, and my object is to produce a simple, strong, durable, compact and comparatively inexpensive machine of this character which will perform its function ex-v M connection that the engagement of the top peditiously, economically and thoroughly.

With this general object in view the invention consists in certain novel and peculia-r features of construction and organization of parts as hereinafter described and claimed; and in order that it may be fully understood, reference is to be had to the accompanying drawings, in which:

Figure 1, is an elevation of the feeding "side of the machine.

Fig. 2, is a plan View of the same. Fig. 3, is a cross section of the machine partly on line IIIIII of Fig. 2 the rest being an end elevation.

Fig. 4, is a vertical longitudinal section taken through the ore and flush water hoppers and the adjacent part of the deck.

Fig. 5, is a sectional perspective view of the deck. 7

In the said drawings, 1 designates the frame of the machine, 2 the inclined deck supported on ball bearings 2 or in any other suitable manner for endwise reciprocatory motion above the frame, the preferred movement of the deck being a bumping as distinguished from a shaking movement, as hereinafter more particularly referred to.

The deck is tilted laterally and endwise to dispose one of its corners,it being preferably of quadrilateral outline.in a somewhat lower plane than any other point, and at its high side and front end, is provided with upstanding walls 3 and 4 respectively, and at its rear end with a perforated trough 5 through which water may drop for "keeping concentrates moist after the.

same have been discharged, from the deck,

the trough preferably terminating'short of toi's bf that class having an inclined deck the lower corner mentioned to provide a discharge opening 6 for the concentrates, a suitable receptacle, not shown, being provided to receive said concentrates, and underlying the lower side or edge of the deck is a chute 7 for the reception of the tailings and sand washed off said side or edge.

The deck is provided with a covering 8 of lineoleum or other smooth-surfaced material, an'd a topcover 8, of rubber or the like 'pro vided at its upper side with narrow longitudinal corrugations or channels, the latter extending longitudinally so that they shall discharge the concentrates onto the linoleum which constitutes a smooth plane over which the concentrates may travel downwardly and forwardly to the discharge opening 6 of the deck, it being notedin this along the saidguide, wall, is .a series of brass chains .11 preferably of the. type known as double or jack chains. These chains constitute flexible swinging riflles .which protect the concentrates against the unimpeded force of wash water flowing over the deck as hereinafter explained and against the large loss in values incidental to an unchecked flow of water. vision of chain riflies is important in that the links permit the water and concentrates to pass over them, and because the rifl'les are flexible theywill vibrate or move with each bump of the deck, and tend to straighten out longitudinally thereof. Also because of their flexibility they will tend to swing to the leftor downward underthe inclination of the deck and the force of the current of water flowing over the deck as hereinafter explained, it will be seen that the violent reciprocatory movements will tendto cause the flexible riflies to automatically straighten out and double up according to the direction of the blow, and that intermediate, these actions or movements the riflles are caused to swing to the left as explained. These constantly shifting riflles thus keep the material in condition to travel radially vso that it cannot bake upon the deck. Furthermore the peculiar character of the rifHes, that is the use of links, allows The prothe concentrated material to pass through the openings thereof and therefore gives a better stratification {of different materials, .7

such as lead, zinc and iron. This not only makes for a greater savmg of material butlncreases the concentrating capacity of the deck.

The crushed ore is deposited upon the corrugated plane of the deck at the high ,side and front end of the latter, by means 'of a hopper box 12,. having a discharge opening 13' controlled by a plurality of slats 14, whichcan be so, set as to effect prac :rent of water discharged into the hopper by.

a wave. controlleddischarge pipe 15.

The hopper 12 is supported over the deck by plates 16 secured at their opposite ends f to the hopper and to the deck.

1 Similar plates lfi are secured to the deck and form supports for a wash water hoper 1'? arran ed over the hi h side of the,

} deck and adapted to discharge chiefly upon the smooth plane thereof.

The inner wall 1 :of the wash water hopper is provided with "pivoted slats 18, the arrangement being such av series of" perforations 17 controlled by that the: slats can be caused to close said 'openingslwholly or in part, and to supply I this hopper with water the pipe'l5 is provided'with a valve controlled branch pipe 19. H The, deck is provided centrally with a longitudinally extendingbeam 20 and the same is connected to-a'fluid pressure motor ,21 mounted on an extension of the frame 1,

and connected by the rod 22 to the said beam, the fluid pressure motor of my Patent "No. 1,142,551, of June S, 1915, exemplifying ing the deck with a bumping action.

the preferred type of device for reciprocatthe motor is not claimed per se, it has not been detailed.

the ore concentrating operation hasv been described in connection with the detailed description of the parts of the machine, recapitul'ation of the machine is not deemed necessary.

4 From the above description it will be apparent that I have produced a machine of the character outlined which possesses all of the features enumerated as, desirable and while I have illustrated and described what now appears to be the preferred ,form of the device, I wish it to be understood that Ireserve the right to make all changes which properly fall within the spirit and scope of the appended claims.

I claim:

1. An ore concentrator, comprising a deck inclined laterally towardone side and end andadapted to discharge concentrates and water at its lowest corner and tailings, sand aiTcFwater at its depressed side, the surface of the deck comprising two parallel planes, the lower plane being smooth and the other plane longitudinally corrugated, the rear margin of the latter extending obliquely downward and rearward from'a" point intermediate the length of the high side of the deck and adapted to discharge concentrates off its oblique edge upon said smooth-plane, and spaced flexible riffles having one of their ends secured to the oblique'end of the raised portion of .the deck.

2. An ore concentrator, comprising a deck inclined laterally toward one side and end and adapted to discharge concentrates and water at its lowest corner and tailings, sand and water at its depressed side, the'surface of the deck comprising two parallel planes,

: the lower plane being smoothand the other plane longitudinally corrugated, the rear margin of the latter extending obliquely downward and rearward from-a point intermediate the'length of the high side of the.

deck and adapted to discharge-concentrates off its oblique edge upon said smoothplane, and swinging riifles attached to thedeck along the 'oblique'margin ofthe corrugated plane and resting on the smooth plane.

3. ,An ore concentrator, comp-rising a deck inclined. laterally-toward one side and end and adapted to discharge concentrates and Water at its lowest corner andtailings, sand and water at its depressed side, the surface of the deck comprising two-parallel planes, the lower plane ibein'g smooth and the other plane longitudinally corrugated, the "rear margin of the. latter extending obliquely downward and rearward from a pointintermediate thelengtlrof the high side of the deck and adapted to-discharge concentrates ofl its oblique edge upon said smooth plane, and flexible rifiies uponthe smooth plane and attached to the deck along theoblique margin of the corrugated plane.

1. An ore concentrator, comprising a-deck inclined :laterally toward one side and end and adapted to discharge concentrates and 1 water at its lowest corner and tailings, sand and water at its depressed side, thesurface of the deck comprising two parallelplanes, the lower plane being smooth and the other plane longitudinally corrugated; the rear margin .of the latter extending obliquely downward and rearward from a point intermediate the length of the highsideof the deckand adapted to discharge concentrates ofl' itsoblique edge uponrsaid smooth plane,

and chain rifiles upon the smooth plane and attached, to the deck'along the oblique marginof the corrugated plane. 7 v

5. An ore concentrator, comprising a deck inclined laterally toward one side and end and adapted to-discharge concentrates and water at its lowest cornerand tailings, sand and water at its depressed side, the surface of the deck comprising two parallel planes, the lower plane being smooth and the other plane longitudinally corrugated, the rear margin of the latter extending obliquely downward and rearward from a point inter-- mediate the length of the high side of the deck and adapted to discharge concentrates off its oblique edge upon said smooth plane, swinging riflies connected to the oblique edge of the deck and freely movable over the smooth plane portion of the deck, an ore feed hopper and a Wash water hopper over the high side of the deck, the former discharging wholly on the high plane and the latter chiefly upon the smooth plane of the deck.

6. An ore concentrator, comprising a deck provided with a raised portion having longitudinal corrugations for discharge at one Copies of this patent may be obtained for length of said deck, and a plurality of spaced swinging riflies having one of their ends secured to the adjacent end of the raised portion of the deck for the purpose specified.

In testimony whereof, I have aflixed my signature hereto.

GEORGE W. BURNHART.

Witnesses:

Rnns D. REES, L. R. CASE.

five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

